Tafel Plots from Illuminated Photoelectrodes: A New Insight Into Charge Transfer Mechanism

Kühne, H.; Schefold, J.

doi:10.1149/1.2086508

Cited by 38 publications

(15 citation statements)

References 10 publications

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“…VFe for the (111) face in 0.5M HC1 or H2SO4 is 0.75 • 0.05V vs. SCE which is essentially the same as previous values (17) corrected for carrier concentration differences. VFB for the (100) face in 0.5M HC1 or H2SO4 is 0.87 +_ 0.05V vs. SCE which is about 0.25V more positive than recently reported (10). Correction for the carrier concentration does not account for the difference.…”

Section: Resultscontrasting

confidence: 61%

“…In fact, the photoreduction of the surface, Eq. [2], is responsible for the overpotential for hydrogen ion reduction (10).…”

Section: Discussionmentioning

confidence: 99%

“…The formation of a surface film during the electrochemical reduction influences its electrochemical behavior. As a result of the reduction of the surface, untreated p-InP is a poor surface for the photoreduction of hydrogen ions to produce hydrogen (10). In this report the surface reactions of p-InP are investigated.…”

mentioning

confidence: 99%

“…Photoelectrochemical processes are particularly interesting because they can be used to study the crystallographic defect structure by electrical and optical techniques (2)(3)(4)(5)(6). The stability of the semiconductor and suppression of its decomposition is important in the use of p-type photoanodes for energy conversion and hydrogen production (7)(8)(9)(10). The selective etching of p-type compound semiconductors is of great interest in producing novel opto-electronic semiconductor devices such as p-i-n detectors integrated with field effect transistors.…”

mentioning

confidence: 99%

“…The cathodic decomposition of p-InP has been observed during hydrogen evolution (7)(8)(9)(10). The thickness of the in-* Electrochemical Society Active Member.…”

mentioning

confidence: 99%

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The Photoelectrochemical Etching of (100) and (111) p ‐ InP

Kohl¹,

Harris²,

Winnick³

1991

J. Electrochem. Soc.

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The photoelectrochemical etching of (100) and (111) p-InP has been investigated in several electrolytes. The reactions involve the photoreduction of the p-InP surface producing an insoluble product, indium, followed by its anodic stripping at a more positive potential. Etch rates in excess of 2 ~m/min have been obtained. High light to dark selectivity can be obtained with etch rates from 0.1 to 0.5 ~m/min. The etching is dependent upon crystal face, temperature, electrode potential, and the cycle time of the potential step. The reactions have been investigated by capacitance measurements, cyclic voltammetry, chronoamperometry, and photoetching measurements. The instability of bare InP in regards to its use as a photoanode in hydrogen production is discussed.

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Section: Resultscontrasting

confidence: 61%

“…In fact, the photoreduction of the surface, Eq. [2], is responsible for the overpotential for hydrogen ion reduction (10).…”

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

“…The cathodic decomposition of p-InP has been observed during hydrogen evolution (7)(8)(9)(10). The thickness of the in-* Electrochemical Society Active Member.…”

mentioning

confidence: 99%

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The Photoelectrochemical Etching of (100) and (111) p ‐ InP

Kohl¹,

Harris²,

Winnick³

1991

J. Electrochem. Soc.

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ChemInform Abstract: Tafel Plots from Illuminated Photoelectrodes. A New Insight Into Charge Transfer Mechanism.

Kuehne

Schefold

1990

ChemInform

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ChemInform Abstract The mechanism of charge transfer in the H2 evolution reaction is studied at bare and metal-coated (Pt, Au, Ag, Cu, Pb) p-and n-type InP electrodes. The flatband potential shift, ∆UFB, of illuminated electrodes is found to be a logarithmic function of the photocurrent density and can be presented in Tafel plots. The slope of such a Tafel plot and the extrapolation toward ∆UFB = 0 reflect the electrocatalytic properties of the electrode surface. A simple Schottky barrier model with subsequent charge transfer at the metal surface can be used to explain quantitatively the observed photocurrent-voltage curves. The results suggest that photocatalysis is not involved in the charge transfer process.

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Challenges and protective strategies on zinc anode toward practical aqueous zinc‐ion batteries

Al‐Abbasi,

Zhao,

et al. 2024

Carbon Neutralization

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Over the past decades, there has been a growing interest in rechargeable aqueous Zn‐ion batteries (AZIBs) as a viable substitute for lithium‐ion batteries. This is primarily due to their low cost, lower redox potential, and high safety. Nevertheless, the progress of Zn metal anodes has been impeded by various challenges, including the growth of dendrites, corrosion, and hydrogen evolution reaction during repeated cycles that result in low Coulombic efficiency and a short lifetime. Therefore, we represent recent advances in Zn metal anode protection for constructing high‐performance AZIBs. Besides, we show in‐depth analyses and supposed hypotheses on the working mechanism of these issues associated with mildly acidic aqueous electrolytes. Meanwhile, design principles and feasible strategies are proposed to suppress dendrites' formation of Zn batteries, including electrode design, electrolyte modification, and interface regulation, which are suitable for restraining corrosion and hydrogen evolution reaction. Finally, the current challenges and future trends are raised to pave the way for the commercialization of AZIBs. These design principles and potential strategies are applicable in other metal‐ion batteries, such as Li and K metal batteries.

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Tafel Plots from Illuminated Photoelectrodes: A New Insight Into Charge Transfer Mechanism

Cited by 38 publications

References 10 publications

The Photoelectrochemical Etching of (100) and (111) p ‐ InP

The Photoelectrochemical Etching of (100) and (111) p ‐ InP

ChemInform Abstract: Tafel Plots from Illuminated Photoelectrodes. A New Insight Into Charge Transfer Mechanism.

Challenges and protective strategies on zinc anode toward practical aqueous zinc‐ion batteries

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